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Method for liquid drainage and gas recovery using oil-foam-resistant drainage agent composition

A technology for liquid drainage and gas production and composition, which is applied in the directions of drilling composition, chemical instrument and method, and production fluid, etc., can solve the problems of poor drainage performance of foam, stop spraying, insufficient oil resistance and temperature resistance of foam, etc. , to achieve the effect of good salt tolerance and good technical effect

Active Publication Date: 2021-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the process of gas well development, the existing foam drainage agent forms a foam with insufficient oil resistance and temperature resistance, poor drainage performance of the foam, resulting in fluid accumulation at the bottom of the well, reduced production of the gas well, or even stop spraying. The oil-foam-resistant drainage agent composition drainage gas production method is applied to the drainage and gas production of condensate oil and gas wells, which can carry liquid efficiently, and has good oil resistance, thermal stability, foaming performance and liquid-carrying ability

Method used

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  • Method for liquid drainage and gas recovery using oil-foam-resistant drainage agent composition
  • Method for liquid drainage and gas recovery using oil-foam-resistant drainage agent composition
  • Method for liquid drainage and gas recovery using oil-foam-resistant drainage agent composition

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Embodiment 1

[0034] Under normal temperature and pressure, weigh alkylamine polyether benzene sulfonate, long-chain polyether nitrogen-containing compounds, and dissolve nano-silica in an aqueous solution with a salinity of 100,000 mg / L according to a mass ratio of 1:2:1. Prepare a 1.0wt% solution to obtain the foam drainage composition HF-1. The composition structure is shown in Table 1.

Embodiment 2

[0036] Under normal temperature and pressure, weigh alkylamine polyether benzene sulfonate, long-chain polyether nitrogen-containing compounds, and dissolve nano-silica in an aqueous solution with a salinity of 100,000mg / L according to a mass ratio of 1:10:5. Prepare a 1.0 wt% solution to obtain the foam drainage composition HF-2. The composition structure is shown in Table 1.

Embodiment 3

[0038] Under normal temperature and pressure, weigh alkylamine polyether benzene sulfonate, long-chain polyether nitrogen-containing compound, and dissolve nano-silica in an aqueous solution with a salinity of 100,000 mg / L according to a mass ratio of 1:0.2:0.5. Prepare a 1.0wt% solution to obtain the foam drainage composition HF-3. The composition structure is shown in Table 1.

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Abstract

The invention relates to a method for liquid drainage and gas recovery using an oil-foam-resistant drainage agent composition. It mainly solves the problems of insufficient oil resistance and poor drainage performance of the foam formed by the existing foam drainage agent in the development of condensate oil and gas wells, resulting in fluid accumulation at the bottom of the well, reduced production of gas wells or even stop spraying. The present invention adopts: 1) injecting the foam-discharging agent composition or the foam-discharging agent composition solution into the water-containing gas well; Contact, form foam fluid, then foam fluid is lifted to ground; Wherein, described foam release agent composition comprises following component: 1 part has the alkylamine polyether benzene sulfonic acid of general molecular formula shown in formula (I) Salt; 0.1 to 50 parts of a long-chain polyether nitrogen-containing compound with a general molecular formula shown in formula (II); 0 to 10 parts of a technical solution for nanoparticles, which better solves this problem and can be used for gas well drainage and gas recovery in industry.

Description

technical field [0001] The invention relates to a method for liquid drainage and gas recovery using an oil-foam-resistant drainage agent composition, in particular to a method for fluid drainage and gas recovery using a foam drainage agent composition for wells containing condensate oil and gas. Background technique [0002] With the intensification of gas field exploitation, water production from gas fields has become a key issue restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the normal production of gas wells. Foam drainage is to inject foam drainage agent into the well through the tubing or tubing annulus, and generate foam with certain stability under the agitation of the air flow. The liquid phase deposited by slippag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C09K8/584
CPCC09K8/584C09K2208/10E21B43/16
Inventor 何秀娟裘鋆马俊伟翟晓东
Owner CHINA PETROLEUM & CHEM CORP
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